Key mechanism for calculating-machines.



if. GABER.

KEY MMHANISM Ffm GALCULATIEG MACHINES.

PI'LIGTION FXL'QD DEG. 26. 1911.

1,023,843, mmm Ap@ -IIIIXIKI JULiUs GRABnip/or nnwyoex, N. Y.

KEY MEGHANISM FOR CALCULATING-MACHINES.

Specification of Letters latent.

Patented Apr. 23, 1912.

Application filed December 26, 1911. Serial No. 667,576.

ticularly comprising novel and effective means. for temporarily lockinga depressed key in its lowered position, and for .automaticallyreleasing said key 'upon the depression of another key of same row.

Additional novel means are provided for vsimultaneously releasing alldepressed keys of the various rows if desired.

In the accompanying drawing: Figure 1 is a vertical section through partof the 4which passes loosely key mechanism. showing 'one row of keys,Fig.2 a -bottom view partly broken away of the mechanism; F ig. 3 avertical section on line 3-3, Fig. 1; Fig. 4 a vertical. section on line1.--4:, 3, and Fig. 5 a detail of the key connecting means.

The keys A10 for actuating the ciphering mechanismof the calculatingmachine are arranged in parallel rows, each row containing-nine'keys-asfully illustrated and described in a oopending patent application tiledby me October 21st, 1911, under Serial No. 655,954,y The keys of .eachrow are adapted tofw co "perate with a shaft 11 which Acarriesa'plurality of axially slidable toothed sectors 12,10ne sector beingprovided for each key. The several sectors 12 contain differentfn'umbers'of teeth according to the keys with which they ai'e coperable.Upon their axial displacement, sectors 12 are adapted to engage toothedwheels 13 rigidly secured to a shaft 14, the parts 11, 12, 13, 111 beingduplicates of the parte 1a, 30, 31, 32

described in the copending patent application hereinabove referred to.4Shaft 14. is operatively connected' to the ciphering mechanism proper,which is fully disclosed in my above cited Patent No. '972,360.

Each key 10 has a depending shank 15' through a correspondin aperture ofthe machine top 16. To sliank.15 is fulcrumed one arm of a two-arm lever17 "pivoted at 18 toni-a Web"19 depending from top 16. The other arm oflever 17 carries a pin 20 which is received within a corresponding slot21 of the substantially horizontal shank of a 'T-shaped lever 22. To theupper arm of the latter is connected a spring 23, While its ylower armisprovided with a knob 24, which engages the groove 25 of a ycolla-r 26.firmly secured to the ad- `ioining sector 12. Springs 23 areso fastenedto web 19 as to turn the lower arms oflcvers 22 to the left (Fig. 1) andthereby raise shanks 15 until their abutments 27 engage top 16. In thisposition of the parts,

. sectors 12 are shifted out of alinement with their respective wheels13 and thus rendered inoperative when shaft 11 is rotated, motion beingtransmitted to shaft 11 from a manually operated shaft 28 through miterwheels 29.

l In close p\roximity to each shank 15, there is pivoted to web\19 at 30an arm 31. At their free ends, arms 31 carry pins 32 which areconnect-ed with each other by links 33, as illust-rated in Figs.'1, 2and 5. Intermediate its arm 31 and links 33,'each pin 32 is adapted tobe engaged by an angular projection or nose 34 formed on the adjoiningkey-shank 15, each nose having an upper horizontal pin rest 35. The pin32 of the one-key 101 is accommodated within a corresponding bore of ashank 36 depending from a slide 37 which is held in. permanentengagement-with the lower side of top 16 by a guide roller 38. Shank 36is engaged by a spring- 39 which tends to draw slide 3'? to 'the left(Fig. 1), in which movements all pins 32 participate.

As thus far described, it will be seen that upon the depression of anyone key in a row,-

its nose 34 in engaging the coperating pin 32 will push the' lattertogether with the entire train. of links 33 to the right (Fig: 1), untilsaid pin Iclears nose 34 and thereby permits spring 39 to return links33 and pins 32 to their initial position. In this way, the rest 35 ofthe depressed key will be engaged by its pin 32, to prevent a rising ofsaid key.'v Upon a depression of another key y the operation describedwill be repeated,

whereby the previously depressed key .will

be freed as will' be readily understood.

Slide 37 is substantially U-shaped as illustrated in Fig. 5, and has aforwardly extending iiiger .37 which is in permanentengagement with atransversely reciprocable bar 40. The latter isarranged 'in closeproximity to the lower side of top plate 16 and is held in place by apair of bell crank levers 4l fulcrumed to said plate at 42. One arm ofeach of these levers is slotted as at 43 for the reception of a pin 44depending from bar 40, while the other lever arms are connected by a rod45. One of the levers 41 is by link 46 connected to one arm of a two-armlever 47 fulcrumed at 48. The other arm of lever 47 is perforated as at49 for the accommodation of a pin 50 projecting upwardly from a rockshaft 51. This shaft is adapted to be manually or automaticallyoscillated Whenever it is desired to unlock the depressed keys, suchmeans not forming part of the present invention.

It will be seen that upon an oscillation of shaft 51, pin 50 tilts lever47 in the direction of arrow a (F ig. 2) and thereby bar 40 is advancedin the direction of arrow b, ci? igs. 1 and 2) to correspondingly shiftsfide 37 and links 33 to the right (Fig. 1). is all pins 32 participatein this movement, the particular pin which had previously engaged therest 35 of the depressed key 10, will clear said rest to liberate thecorresponding shank 15, thereby permitting spring 23 to raise said shankyand key.

I claim:

l. In a device of the character described, a row ot depressible keys, atrain of links arranged in proximity thereto, and means intermediatesaid keys and links for maintaining the keys in their lowered position.

2. In a device of the character described, a row of depressible keys, atrain of links arranged in proximity thereto, pivoted arms engaging saidlinks, and means intermediate said keys and links for maintaining thekeys in their lowered position.

3. In a device of the character described, a row of d'epressible keyshavin0 depending Shanks, noses on said shanks, pms adapted to engagesaid noses, and links connecting said pins.

4. In a device of the character described,

a row of depressible keys having depending shanks, noses on said Shanks,pivoted arms arranged in proximity to the Shanks, pins carried by thearms and adapted to engage the noses, and links connecting said pins.

5. In a device of the character descricd, a row of depressible keyshaving depending Shanks, noses on saidV Shanks, pivoted arms arranged inproximity to the Shanks, pins carried by the arms and adapted to engagethe noses, links connecting said pins, and a spring operativelyconnected to said links.

6. In a device of the character described, a row of depressible keyshaving depending Shanks, noses on said Shanks, plvoted arras arranged inproximity to the Shanks, pins carried by the arms and adapted to engagethe noses, links connecting said pins, a slide connected to one of thetlanking pins, and means for actuating said slide.

7. In a device of the character described, a row of depressible keys, atrain of links varranged in proximityT thereto, means intermediate saidkeys and links for maintaining` the keys in their lowered position, anda spring-influencedslide operatively connected to one end of the train.

8. In a device of the character described, a row of depressible keyshaving depending Shanks; noses on said Shanks, pi'voted arms arranged inproximity to the shanks, pins carried by the arms and adapted to engaget-he noses, links connecting said pins, a spring-influenced slideconnected to one of the flanking pins, and a reciprocative bar engagingsaid slide.

9. In a machine of the character described, a. casing having anapertured top plate, a row of depressible keys, shanks on said keys thatpass through the plate-apertures, abutments on said shanks adapted toengage said top plate, noses formed on the Shanks below said abutments,and interlinked pins adapted to engage said noses.

10. In a machine of the character described, a casing having anapcrtured top plate, a ron of depressible keys, Shanks on said keys thatpass through the plate-apertures, angular noses formed on said shanksand having rests, and interlinked pins adapted to engage said rests.

JULIUS GRABER.

Witnesses ARTHUR E. Znnrn, KA'rrrnnYNn Koen.

